Effect of vibration excitation locations on structural damage detection using the CSLDV technique: Simulation and testing

D. Di Maio*, N. Zampognaro, C. Zang, D. J. Ewins

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

8 Citations (Scopus)

Abstract

In recent years, the CSLDV (Continuing Scanning LDV) technique has been developed to obtain the ODS (Operational Deflection Shape) of a structure within a very short period of time. The ability to predict and to measure the ODS of a vibrating structure suggests its use to increase the potential for structural damage detection, localization and severity assessment. Previous research based on simulation of some simple test cases showed the effect of excitation locations on structural damage detection. Four steel plates were acquired and a FEM model of that structure was produced. Modal analysis, theoretical and experimental, was performed on the plate to obtain eigenvalues and eigenvectors and to update the FEM model. This time, the damage was simulated either using two permanent magnets which could be attached and de-attached easily without compromise the integrity of the structure or reducing the thickness of some elements. Hence, 4 damaged plates were modelled in FE software upon the position of the damage. The simulation and testing of the ODSs and the MSE (Mean Square Error) of the 4 plate structures in the damaged and the undamaged cases were performed based on CSLDV measurement method and compared respectively. Results show effect of vibration excitation location in the damage detection.

Original languageEnglish
Title of host publicationSeventh International Conference on Vibration Measurements by Laser Techniques
Subtitle of host publicationAdvances and Applications
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event7th International Conference on Vibration Measurements by Laser Techniques: Advances and Applications 2006 - Ancona, Italy
Duration: 19 Jun 200622 Jun 2006
Conference number: 7

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6345
ISSN (Print)0277-786X

Conference

Conference7th International Conference on Vibration Measurements by Laser Techniques: Advances and Applications 2006
CountryItaly
CityAncona
Period19/06/0622/06/06

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